package org.jeecg.modules.test;

import lombok.SneakyThrows;
import okhttp3.*;
import org.json.JSONObject;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Base64;

public class Mp3ToPcm {
    public static final String API_KEY = "R5CjUIWvZOoQlrnaBC2As50A";
    public static final String SECRET_KEY = "bMOLMiKF2kGlADc1wxk9bqnoiRoTeqGk";

    static final OkHttpClient HTTP_CLIENT = new OkHttpClient().newBuilder().build();

    public static void main(String []args) throws IOException {
        MediaType mediaType = MediaType.parse("application/json");
        // speech 可以通过 getFileContentAsBase64("C:\fakepath\output.wav") 方法获取,如果Content-Type是application/x-www-form-urlencoded时,使用getFileContentAsBase64Urlencoded方法获取
        String speech =  getFileContentAsBase64("D:/output.wav");
        RequestBody body = RequestBody.create(mediaType, "{\"format\":\"pcm\",\"rate\":16000,\"channel\":1,\"cuid\":\"1621423282132471810\",\"speech\":\""+speech+"\",\"len\":114138,\"token\":\"" + getAccessToken() + "\"}");
        Request request = new Request.Builder()
                .url("https://vop.baidu.com/server_api")
                .method("POST", body)
                .addHeader("Content-Type", "application/json")
                .addHeader("Accept", "application/json")
                .build();
        Response response = HTTP_CLIENT.newCall(request).execute();
        System.out.println(response.body().string());

    }

    /**
     * 获取文件base64编码
     * @param path 文件路径
     * @return base64编码信息，不带文件头
     * @throws IOException IO异常
     */
    static String getFileContentAsBase64(String path) throws IOException {
        byte[] b = Files.readAllBytes(Paths.get(path));
        return Base64.getEncoder().encodeToString(b);
    }
    /**
     * 获取文件base64 UrlEncode编码
     * @param path 文件路径
     * @return base64编码信息，不带文件头
     * @throws IOException IO异常
     */
    static String getFileContentAsBase64Urlencoded(String path) throws IOException {
        return URLEncoder.encode(getFileContentAsBase64(path), "utf-8");
    }


    /**
     * 从用户的AK，SK生成鉴权签名（Access Token）
     *
     * @return 鉴权签名（Access Token）
     * @throws IOException IO异常
     */
    @SneakyThrows
    static String getAccessToken() throws IOException {
        MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
        RequestBody body = RequestBody.create(mediaType, "grant_type=client_credentials&client_id=" + API_KEY
                + "&client_secret=" + SECRET_KEY);
        Request request = new Request.Builder()
                .url("https://aip.baidubce.com/oauth/2.0/token")
                .method("POST", body)
                .addHeader("Content-Type", "application/x-www-form-urlencoded")
                .build();
        Response response = HTTP_CLIENT.newCall(request).execute();
        return new JSONObject(response.body().string()).getString("access_token");
    }
}
